DOI: 10.1016/j.atmosenv.2017.06.018
Scopus记录号: 2-s2.0-85021116772
论文题名: Molecular composition of organic aerosol over an agricultural site in North China Plain: Contribution of biogenic sources to PM2.5
作者: Li X ; , Liu Y ; , Li D ; , Wang G ; , Bai Y ; , Diao H ; , Shen R ; , Hu B ; , Xin J ; , Liu Z ; , Wang Y ; , Guo X ; , Wang L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 164 起始页码: 448
结束页码: 457
语种: 英语
英文关键词: Agricultural areas
; BSOA
; Formation
; In-situ pH
; Sugars
Scopus关键词: Aerosols
; Agricultural wastes
; Agriculture
; Air quality
; Atmospheric composition
; Biological materials
; Isoprene
; Organic compounds
; Plants (botany)
; Sugars
; Volatile organic compounds
; Agricultural areas
; Biogenic volatile organic compounds
; BSOA
; Fine particulate matter (PM2.5)
; Formation
; Particulate organic matters
; Situ pH
; Water-soluble organic carbon
; Organic carbon
; carbohydrate
; carbon
; galactosan
; herbaceous agent
; isoprene
; levoglucosan
; mannosan
; organic carbon
; organic compound
; pinene
; unclassified drug
; volatile organic compound
; aerosol
; agricultural land
; air quality
; biogenic material
; chemical composition
; concentration (composition)
; in situ measurement
; isoprene
; particulate matter
; pH
; reaction kinetics
; sugar
; tracer
; volatile organic compound
; Article
; biomass
; China
; controlled study
; humidity
; meteorological phenomena
; meteorology
; particulate matter
; plant residue
; priority journal
; secondary organic aerosol
; China
; North China Plain
; Shandong
; Yucheng
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Sugars and biogenic secondary organic aerosols (BSOAs) are substantial components of particulate organic matter, which affects regional and global air quality and climate. Fine particulate matter (PM2.5) samples were collected from 20 June to 30 July 2015 on a diurnal/nocturnal cycle in Yucheng, China in the North China Plain. The PM2.5 samples were analyzed for sugars and SOA tracers derived from biogenic volatile organic compounds (BVOCs) and other compounds, such as water soluble ions, element carbon (EC), organic carbon (OC) and water soluble organic carbon (WSOC). The quantified organic components accounted for 4.7% and 0.4% of the OC and PM2.5, respectively. SOA tracer concentrations were weakly higher during the day (101.6 ± 61.7 ng m−3) than at night (90.2 ± 41.5 ng m−3)(t = 0.610, P > 0.05), whereas sugar showed higher concentrations at night (227.0 ± 196.9 ng m−3) than during the day (177.9 ± 145.4 ng m−3)(t = −1.329, P > 0.05). Anhydro sugar (mannosan, galactosan, and levoglucosan) were the main components of the measured sugars and accounted for 58.5% and 75.6% of the daytime and nighttime measurements. The levoglucosan/mannosan ratios were 20.2 ± 12.9 and 17.6 ± 9.1 for the daytime and nighttime samples, respectively, indicating that crop residues, herbaceous plants and hardwood were the dominant types of biomass burned in the Yucheng region. Isoprene SOA tracers exhibited the highest levels among the measured SOA tracers, followed by α-pinene SOA tracers. The concentration of BSOC estimated using the tracer method was 3.9–1817.5 ng C m−3 and accounted for 0.1–26.0% of the OC. A clear negative correlation (r = 0.53) between isoprene-derived SOA and in-situ pH demonstrated that acid-catalyzed heterogeneous reactions can significantly enhance SOA mass. In addition, isoprene-derived SOA increased with the relative humidity (RH) when the RH was lower than 50%, whereas it decreased when the RH was higher than 50%. © 2017 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82733
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Chemistry, Analytical and Testing Center, Capital Normal University, Beijing, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
Recommended Citation:
Li X,, Liu Y,, Li D,et al. Molecular composition of organic aerosol over an agricultural site in North China Plain: Contribution of biogenic sources to PM2.5[J]. Atmospheric Environment,2017-01-01,164